Rhyme Of The Day

Various meanderings with a rhyme in there somewhere.

Tuesday, May 04, 2010

Before Da Vinci's Helicopter

Unlike the acorn, the maple seed can fall pretty far from the tree.
High-speed video reveals that maple seed pods remain airborne for miles by harnessing the power of tornado-like vortexes generated as they spin.

The flat, elongated pods are densest at their seed-containing ends, a configuration that causes them to rotate while falling.

Rotation produces the pods’ nickname — whirlybirds — and creates tiny vortexes above their leading edges. By pulling in air, a vortex lowers air pressure above a pod’s surface, effectively sucking it upwards.



It's the season here. Walking home, I had to make my way through a storm of the things.

With whirling grace
they go,
seeking a place
to grow.
John Enright at 5:52 PM

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